1147738649 has 4 divisors (see below), whose sum is σ = 1159102500. Its totient is φ = 1136374800.

The previous prime is 1147738633. The next prime is 1147738679. The reversal of 1147738649 is 9468377411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9468377411 = 101 ⋅93746311.

It can be written as a sum of positive squares in 2 ways, for example, as 1091113024 + 56625625 = 33032^2 + 7525^2 .

It is a cyclic number.

It is not a de Polignac number, because 1147738649 - 2⁴ = 1147738633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1147738597 and 1147738606.

It is not an unprimeable number, because it can be changed into a prime (1147738619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5681774 + ... + 5681975.

It is an arithmetic number, because the mean of its divisors is an integer number (289775625).

Almost surely, 2^1147738649 is an apocalyptic number.

It is an amenable number.

1147738649 is a deficient number, since it is larger than the sum of its proper divisors (11363851).

1147738649 is a wasteful number, since it uses less digits than its factorization.

1147738649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11363850.

The product of its digits is 1016064, while the sum is 50.

The square root of 1147738649 is about 33878.2917072275. The cubic root of 1147738649 is about 1047.0023797111.

The spelling of 1147738649 in words is "one billion, one hundred forty-seven million, seven hundred thirty-eight thousand, six hundred forty-nine".